Ergonomics is the science of the design of equipment, between human  operators and their workplace, which can be used to design  working  environments that maximize user efficiency.
The 5 aspects of  Ergonomics are Safety, comfort, ease of use, productivity performance,  Aesthetics.
For safety, there are wall-mounted rails to aid the  elderly when they are moving around.
For comfort, there are  wheelchairs so the elderly can move around with ease.
For ease of  use, there are motion activated lights to help the elderly move around  at night without having to on the lights.
For productivity  performance there are canes to help the elderly walk faster and  steadier.
For aesthetics, there is the massage chair, it looks good  as a couch as well as massages your back.
 
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